|First appearance||"Time Keeps on Slippin'" (3ACV14)|
Doomsday devices are devices designed to destroy as much possible. Several of them are created by Professor Farnsworth who is always looking for opportunities to use them. He used one which imploded creating a black hole which sucked in the cronotons. The Planet Express building has at least two storage areas for these devices. Farnsworth's favourite was the Spheroboom, until it was used and therefore destroyed.